<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th><input type="checkbox" v-model="shopAll" /> <span>全选</span></th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>

      <tbody>
        <tr
          is="aaa"
          v-for="(ind, index) in goodList"
          :key="index"
          :shopName="ind"
          @jia="jiaa"
          @jian="jiann"
          :index="index"
          @delE="delFn"
        ></tr>
      </tbody>

      <tfoot>
        <tr>
          <td>合计:{{ isAll }}</td>
          <td colspan="5"></td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import aaa from "./components/shopCar";
export default {
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  // 组件名
  components: {
    aaa,
  },
  // 计算属性
  computed: {
    shopAll: {
      set(val) {
        this.goodList.forEach((obj) => (obj.checked = val));
      },
      get() {
        return this.goodList.every((obj) => obj.checked == true);
      },
    },
    isAll() {
      return this.goodList.reduce((sum, obj) => {
        if (obj.checked === true) {
          sum += obj.num * obj.price;
        }
        return sum;
      }, 0);
    },
  },
  //方法
  methods: {
    jiaa(ind) {
      this.goodList[ind].num++;
    },
    jiann(ind) {
      this.goodList[ind].num > 0 && this.goodList[ind].num--;
    },
    delFn(ind) {
      this.goodList.splice(ind, 1);
    },
  },
};
</script>

<style>
</style>